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Import of the watch repository from Pebble

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Matthieu Jeanson 2024-12-12 16:43:03 -08:00 • committed by Katharine Berry
commit 3b92768480
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platform/robert/boot/src/vector_table.c Normal file
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/*
* Copyright 2024 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
extern int main(void);
//! These symbols are defined in the linker script for use in initializing
//! the data sections. uint8_t since we do arithmetic with section lengths.
//! These are arrays to avoid the need for an & when dealing with linker symbols.
extern uint8_t __data_load_start[];
extern uint8_t __data_start[];
extern uint8_t __data_end[];
extern uint8_t __bss_start[];
extern uint8_t __bss_end[];
extern uint8_t _estack[];
__attribute__((__noreturn__)) void Reset_Handler(void) {
memcpy(__data_start, __data_load_start, __data_end - __data_start);
// Clear the bss section, assumes .bss goes directly after .data
memset(__bss_start, 0, __bss_end - __bss_start);
main();
__builtin_unreachable();
}
__attribute__((__noreturn__)) void Default_Handler(void) {
// This handler is only called if we haven't defined a specific
// handler for the interrupt. This means the interrupt is unexpected,
// so we loop infinitely to preserve the system state for examination
// by a debugger
while (true) {}
}
// All these functions are weak references to the Default_Handler,
// so if we define a handler in elsewhere in the firmware, these
// will be overriden
#define ALIAS(sym) __attribute__((__weak__, __alias__(sym)))
ALIAS("Default_Handler") void NMI_Handler(void);
ALIAS("Default_Handler") void HardFault_Handler(void);
ALIAS("Default_Handler") void MemManage_Handler(void);
ALIAS("Default_Handler") void BusFault_Handler(void);
ALIAS("Default_Handler") void UsageFault_Handler(void);
ALIAS("Default_Handler") void SVC_Handler(void);
ALIAS("Default_Handler") void DebugMon_Handler(void);
ALIAS("Default_Handler") void PendSV_Handler(void);
ALIAS("Default_Handler") void SysTick_Handler(void);
// External Interrupts
#define IRQ_DEF(idx, irq) ALIAS("Default_Handler") void irq##_IRQHandler(void);
#include "irq_stm32f7.def"
#undef IRQ_DEF
__attribute__((__section__(".isr_vector"))) const void * const vector_table[] = {
_estack,
Reset_Handler,
NMI_Handler,
HardFault_Handler,
MemManage_Handler,
BusFault_Handler,
UsageFault_Handler,
0,
0,
0,
0,
SVC_Handler,
DebugMon_Handler,
0,
PendSV_Handler,
SysTick_Handler,
// External Interrupts
#define IRQ_DEF(idx, irq) [idx + 16] = irq##_IRQHandler,
#include "irq_stm32f7.def"
#undef IRQ_DEF
};